Skip to main content

Water Heating Systems

Electric Tankless Models Service Bulletins

Heating Canister Replacement Directions

Heating Canister Replacement Directions

EP-25 Comprehensive Troubleshooting Guide

EP-01 Light Off - Water Not Hot

EP-02 Neon Light On - Water Not Hot

EP-22 Replacing Control Board

EP-23 Removing & Replacing Element Assembly

EP-24 Removing & Replacing Flow Transducer

EP-03 Freeze Prevention

EP-01 Freeze Prevention

E1-11 Warm Inlet Water Modification

E1-02 Overcoming Fluctuating Temperatures

E1-21 Replacing Flow Switch

E1-22 Replacing Circuit Board

12 kW Troubleshooting Guide

Low kW Troubleshooting Guide

Triac Printed Circuit Board Replacement

Heating Element Replacement

Flow Sensor Replacement

High kW Troubleshooting Guide

Electric Mini-Tank Models Service Bulletins

P1-01 Resetting Thermostat & Setting Temp

P1-21 Replacing Element Gasket or Anode

P1-22 Replacing Thermostat

Anode Rod Inspection

Water Quality Requirements

Gas Therm Models Service Bulletins

Replacing the Control Unit

A2 Error Code Troubleshooting

C6-C7 Error Code Troubleshooting

Replacing Primary Fan and Main Burner

E2 Error Code Troubleshooting

A3-E3 Error Code Troubleshooting

A4-E4 Error Code Troubleshooting

3rd Party Domestic Hot Water Recirculation Systems

Checking & replacing temperature sensors

Replacing the gas valve

Cleaning & replacing ignition group

E1 Error code troubleshooting

EA Error code troubleshooting

Control board diagnostics

Installing AQ3ES wall thimble to uneven masonry surfaces

Checking & replacing temperature sensors

Descaling the heat exchanger

Measuring gas pressure

E9 Error code troubleshooting

EC Error code troubleshooting

Winterizing & freeze prevention

Measuring and adjusting CO2

Replacing the Copper Heat Exchanger

Removing & replacing the water valve

Direct Hot Water Recirculation

Display blank, fuse troubleshooting

Water Valve Reset

Reducing backdraft on condensing appliances

Replacing & servicing the condensing heat exchanger

Replacing the control unit

Replacing & servicing the condensing heat exchanger

Cleaning & replacing hydro generator

Replacing the control box

Replacing the electro valves

Cleaning & replacing the pilot assembly

Checking gas pressure

Negative air & freeze prevention

No spark with hot water flow

Pilot flame, no burner flame troubleshooting

Winterizing and freeze prevention

Lowering temperature

Removing and cleaning the burners

Cleaning the inlet filter

Replacing the electromagnet

Descaling the heat exchanger

Replacing ECO/Temperature Limiter

Checking the draft

Gas Tankless Models Service Bulletins

Reducing Backdraft on Condensing Appliances

A4-E4 Error Code Troubleshooting

Replacing the Control Unit

EA Error Code Troubleshooting

A3-E3 Error Code Troubleshooting

Reducing Backdraft on Non-Condensing Appliances

Temperature Fluctuation Troubleshooting

A2 Error Code Troubleshooting

A7 Error Code Troubleshooting

A9 Error Code Troubleshooting

EA Error Code Troubleshooting

EC Error Code Troubleshooting

E9 Error Code Troubleshooting

Checking Gas Pressure

Measuring and Adjusting CO2

Condensation and Rain Prevention Requirements

Replacing and Cleaning the Electrodes

Gas Conversion

Descaling the Heat Exchanger

Manual Supplement - Twin Pipe Requirements for Freezing Climates

Testing and Replacing Temperature Sensors

Cleaning Inlet Water Filter (all models)

Temperature Fluctuation troubleshooting (all models)

Water Valve Rebuilding (125B)

Water Valve Rebuilding (125BL)

Water Valve Rebuilding (125BS)

Indirect Tanks Service Bulletins

Anode Rod Inspection

Water Quality Requirements